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A kind of macromolecular photoinitiator containing benzophenone group and preparation method thereof

A technology of photoinitiator and benzophenone, applied in the field of macromolecular photoinitiator and its preparation, can solve the problems of toxicity, product odor and the like

Active Publication Date: 2017-04-19
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the traditional photocuring system, the residual small molecule photoinitiator or its photolytic fragments are easy to migrate from the cured coating to the surface, causing the product to produce odor and even be toxic during use.

Method used

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  • A kind of macromolecular photoinitiator containing benzophenone group and preparation method thereof
  • A kind of macromolecular photoinitiator containing benzophenone group and preparation method thereof
  • A kind of macromolecular photoinitiator containing benzophenone group and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0067] The present embodiment provides a kind of macroinitiator ADBPT-10, is prepared according to the following steps:

[0068] S1. Synthesis of triazine derivatives containing two benzophenone units:

[0069] Add 4.66 g (25 mmol) of cyanuric chloride and 0.41 g (1.25 mmol) of tetrabutylammonium bromide into a 500 mL single-necked flask, dissolve them in 150 mL of dichloromethane, and place them in a low-temperature tank at 0-5 °C. Take another 10.50 g (52.5 mmol) of 4-hydroxybenzophenone and 2.10 g (52.5 mmol) of NaOH in a 150 mL beaker, dissolve them in 150 mL of distilled water, and add them dropwise to the dichloromethane solution. After the dropwise addition, the temperature was raised to about 12°C, and the reaction was carried out at a constant temperature for 12 h to obtain a colorless liquid with two phases, which was separated with a separatory funnel. The organic phase was extracted 3-4 times with distilled water, anhydrous MgSO 4 After drying, filtering and rota...

Embodiment 2

[0082] S1, S2, S3 are the same as the corresponding steps in Embodiment 1.

[0083] S4. Synthesis of macromolecular photoinitiators:

[0084] In this embodiment, the amount of the polymerizable photoinitiator ADBPT is increased to 20% by mass, and the rest are the same as in Embodiment 1. The resulting macromolecular photoinitiator is designated as ADBPT-20.

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Abstract

The invention discloses a macromolecular photoinitiator containing diphenyl ketone groups and a preparation method of the macromolecular photoinitiator. The general structural formula of the macromolecular photoinitiator containing the diphenyl ketone groups is shown in the formula (I), wherein R1 refers to a methyl group or hydrogen; R2 refers to an alkyl group, hydrogen, an ethoxyl group or a hydroxypropyl group; R3 refers to an alkyl group, hydrogen or an ethoxyl group; R4-8 and R'4-7are separately selected from hydrogen or an alkyl group; R9 refers to a methyl group or hydrogen. The designed and synthesized macromolecular photoinitiator is obtained through copolymerization of a synthesized special polymerizable photoinitiator. According to the adopted polymerizable photoinitiator, two diphenyl ketone units contained in each molecule are fixed on two sides of a rigid triazine ring and are not contacted with each other, so that the probability of combination of adjacent free radicals is greatly decreased, and the photoinitiation efficiency is improved; meanwhile, the polymerizable photoinitiator contains amido hydrogen supply units, and accordingly, comonomers containing hydrogen supply components such as tertiary amine and the like are not required to be added additionally during preparation of the macromolecular photoinitiator.

Description

technical field [0001] The invention belongs to the industrial field of radiation curing of polymer materials, and in particular relates to a macromolecular photoinitiator containing a benzophenone group and a preparation method thereof. Background technique [0002] UV curing technology has the characteristics of no volatile organic solvents, fast curing speed, low energy consumption, and good performance of cured products, so it is widely used in coatings, inks, adhesives, photoresists, laser 3D printing and other fields. [0003] In the traditional photocuring system, the residual small molecule photoinitiator or its photolytic fragments are easy to migrate from the cured coating to the surface, resulting in odor and even toxicity during the use of the product. One of the ways to avoid the above problems is to introduce unsaturated double bonds into small molecule photoinitiators, that is, polymerizable photoinitiators. By participating in polymerization, the small molec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/48C08F220/18C08F220/14C08F220/36C08F222/20
CPCC08F2/48C08F220/14C08F220/18C08F220/1804C08F220/36C08F222/1006
Inventor 曾兆华陈文斌杨建文王珊
Owner SUN YAT SEN UNIV
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